Suporte a atributos.

[cascardo/declara.git] / lib / attr.c

diff --git a/lib/attr.c b/lib/attr.c
new file mode 100644 (file)
index 0000000..3f98dbc
--- /dev/null
+++ b/lib/attr.c
@@ -0,0 +1,64 @@
+/*
+ *  Copyright (C) 2015  Thadeu Lima de Souza Cascardo <cascardo@cascardo.eti.br>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "attr.h"
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "pmhash.h"
+
+int attr_set(struct pmhash **pmhash, char *key, char *val)
+{
+       int r = -ENOMEM;
+       key = strdup(key);
+       if (!key)
+               return r;
+       val = strdup(val);
+       if (!val) {
+               free(val);
+               return r;
+       }
+       r = pmhash_add(pmhash, key, val);
+       if (r) {
+               free(key);
+               free(val);
+       }
+       return r;
+}
+
+int attr_parse(struct pmhash **pmhash, char *arg)
+{
+       int r = -EINVAL;
+       char *val;
+       val = strchr(arg, '=');
+       if (!val)
+               return r;
+       *val++ = '\0';
+       return attr_set(pmhash, arg, val);
+}
+
+char * attr_get(struct pmhash *pmhash, char *key)
+{
+       return (char *) pmhash_get(pmhash, key);
+}
+
+int attr_out(FILE *f, struct pmhash *attr, char *key, int size)
+{
+       return fprintf(f, "%-*.*s", size, size, attr_get(attr, key) ?: "");
+}